Superconducting thin-film flux transformers of YBa sub 2 Cu sub 3 O sub 7 minus x

Journal Article · Mon Oct 29 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104015· OSTI ID:6079167

Wellstood, F C; Kingston, J J; Ferrari, M J; Clarke, J ^[1]

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1. Department of Physics, University of California, Berkeley, CA (USA) Center for Advanced Materials, Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, CA (USA)

Using a three-layer YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}-SrTiO{sub 3}-YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} {ital in} {ital situ} laser deposition process, we have constructed thin-film flux transformers which have pickup loops 10 mm on a side and input coils with ten turns. Each layer was patterned with a shadow mask or photolithography. The flux transformers were inductively coupled to a dc superconducting quantum interference device (SQUID) at 4.2 K to determine their transition temperature, and the temperature dependence of their critical current and coupling efficiency. The best flux transformer had a transition temperature of 77 K, and enhanced the magnetic field response of the SQUID by a factor of 9.5.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6079167
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 57:18; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COATINGS
COUPLING
DESIGN
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FABRICATION
FILMS
FLUXMETERS
HIGH-TC SUPERCONDUCTORS
LASER RADIATION
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
OPERATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SQUID DEVICES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSFORMERS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
USES
VAPOR DEPOSITED COATINGS